>-r ry 



How To Know 

 THE GRASSES 



-GfiOfge M. Gray Museum 



Marine Biological Laboratory 



Pictured-Keys for determining^t??f cS^^^^^n'^Tr^ °^ 

 portant American grasses with suggestions 

 and aids for their study. 



By 



RICHARD W. POHL 



Associate Professor Botany 

 Iowa State College 



MM 



WM. C. BROWN COMPANY 



JLubliskers 



DUBUQUE. IOWA 



